Motion-picture machine.



B. STECHBART. MOTION PICTURE MACHINE.

I APPLICATION FILED- FEB. 5. I918. 1,287,500.

Patented Dec. 10, 1918.

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B STECHBART. MOTION PICTURE MACHINE. I APPLICATION FILED FEB. 5, l9l8ff1 ,287,5Q. Patented Dec. 10, 1918.

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' $726760 Lfi iaaazfp V Original application filed May 7, 1917,"SeriaINo. 166,865.

UNITED STATES PATENT OEEIOE.

DELAWARE.

BRUNO STECHBART, OF CHICAGO, ILLINOIS, ASSIGNOR. BY MESNE ASSIGNMENTS,T0

AMERICAN PR OJEGTING cOMPANY, or CHICAGO,

ILLINOIS, A CORPORATION OF I MOTION-PICTURE MACHINE.

Specification of Letters Patent.

Patented Dec. 10, 1918. Divided and this application file d February 5,

1918. Serial No. 215,448.

. To all whom it may concern:

' tion-Picture Machines, of which the following is a specification.

This invention relates to the type of portable motion picture machinesdescribed in detail inprior application for Letters Patent, Serial No.166,865, filed May 7, 1917, whereof the present application is adivision.

' The object of the present improvement is to provide a simple andefficient structural arrangement and combination of the film feedingmechanism and a lens member of the condenser of a motion picturemachine, afiording close and efi'ective illumination at the light orfilm aperture of the machine, and in which such lens member isautomatically moved to one side during the operation of replacing, etc,the film in the feeding mechanism, all as will hereinafter more fullyappear.

In the accompanying drawings Figure l, is a detail vertical section of aportable motion picture machine having the present improvement applied.

Fig. 2 is a plan view, with the inclosing casing in section.

Like reference numerals indicate like .parts in both views.

Referring to the drawings, 1 designates a box or casing, preferably ofthe rectangular form shown, and adapted to inclosethe film feeding, filmguiding and film reeling mechanisms of a motion picture machine, andafford a support for the usual projection objective 2, lamp house 3 andcondenser usually associated with the aforesaid mechanisms. With a viewto aiford convenient access to the mechanisms aforesaid, the mainportions of the respective side walls of the casing 1 are hinged to theother portion of said casing to constitute entry doors 4 and 5 to theinterior of the casing and parts and mechanisms contained therein in thevarious operatioiis of the machine in actual use.

6 designates the'supporting frame or casing for the film feeding andguiding mechanisms above referred to, and preferably of the closed shellform shown in the drawings and having spaced vertical walls formed thefront wall of the casing or box 1 aforesaid, and near its forward endthe frame or casing 6 is provided with a transversely enlarged shell orcasing 7 adapted to contain the bladed lightshutter of the machine.

8 designates the intermittent film feeding sprocket drum of the filmfeeding mecha nism aforesaid, and 9 designates the hinged gate forconfining the passing picture film in proper relation to the usual lightaperture of the casing 6 aforesaid.

The lamp house 3 heretofore referred to carries the usual primary lensmember or members 10 of the condenser systems of the machine, and inconnection therewith the present improvement involves a structuralformation and arrangement of parts as follows 11 designates a secondarylens member carried by a transversely arranged bracket support 12attached to the hinged door 5 of the main casing 1, as shown in Fig. 2.As so arranged the secondary lens member 11 is adapted to swing awayfrom the film feeding and other mechanisms with which it is ordinarilyassociated, as the door 5 is opened to afford access to the'filmmechanisms aforesaid. With the described arrangement it is practicaltohave the lens member 11 occupy aspa-fce immediately back of the filmgate 9 aforesaid, and thus aid in the attainment of'a compact structurein the complete machine.

Having thus fully described my said inention, what I claim as new anddesire to secure by Letters Patent, is v 1. In a motion picture machine,the combination of a casing or support, a film guiding and feedingmechanism fixedly associated therewith, a condenser lens member ha 'ingcloseoperative relation to said mechan'sm, a holder for said lensmounted movably, in relation to said mechanism so that the holder andlens may be moved away from said\ mechanism to give free access to thesame, substantially as set forth.

2. In a motion picture machine, the combination of a casing or support,a film guiding and feeding mechanism fixedly associated-therewith, acondenser lens member having close operative relation to said mechanism,a holder for said lens mounted in a pivotal manner in relation to saidmechabination of a casing having a hinged door,

a film feeding and guiding mechanism arranged 1n the nterior Of-Sfl1Clcasing, and

a condenser lens member carried on said door and having close operativerelation to 10 the film feeding and guiding mechanism aforesaid,substantially as set forth.

Signed at Chicago, Illinois this 1st day. of February, 1918.

BRUNO STECHBART.

